Rip/singularity free cosmology models with bulk viscosity
文献类型：期刊论文
| 作者 | Meng, XH ; Ma, ZY |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2012 |
| 卷号 | 72期号:7页码:2053 |
| 关键词 | EQUATION-OF-STATE PALATINI FORMULATION DARK ENERGY R-1-MODIFIED GRAVITY FRIEDMANN COSMOLOGY VISCOUS COSMOLOGY SCALAR FIELD UNIVERSE CONSTANT SUPERNOVAE |
| ISSN号 | 1434-6044 |
| 通讯作者 | Meng, XH (reprint author), Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China. |
| 英文摘要 | In this paper we present two concrete models of non-perfect fluid with bulk viscosity to interpret the observed cosmic accelerating expansion phenomena, avoiding the introduction of exotic dark energy. The first model we inspect has a viscosity of the form zeta = zeta 0 + (zeta(1) -zeta(2)q) H by taking into account the decelerating parameter q, and the other model is of the form zeta = zeta(0) + zeta H-1 + zeta H-2(2). We give the exact solutions of such models and further constrain them with the latest Union2 data as well as the currently observed Hubble-parameter dataset (OHD). Then we discuss the fate of universe evolution in these models, which confronts neither future singularity nor little/pseudo rip. From the resulting curves by best-fittings we find a much more flexible evolution processing due to the presence of viscosity while being consistent with the observational data in the region of data fitting. With the bulk viscosity considered, a more realistic universe scenario is characterized comparable with the Lambda CDM model but without introducing the mysterious dark energy. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | Natural Science Foundation of China [11075078, 10675062]; project of knowledge Innovation Program (PKIP) of Chinese Academy of Sciences (CAS) through the KITPC [KJCX2.YW.W10] |
| 原文出处 | http://dx.doi.org/10.1140/epjc/s10052-012-2053-7 |
| 语种 | 英语 |
| WOS记录号 | WOS:000307269400002 |
| 公开日期 | 2014-04-25 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15067]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Meng, XH,Ma, ZY. Rip/singularity free cosmology models with bulk viscosity[J]. EUROPEAN PHYSICAL JOURNAL C,2012,72(7):2053. |
| APA | Meng, XH,&Ma, ZY.(2012).Rip/singularity free cosmology models with bulk viscosity.EUROPEAN PHYSICAL JOURNAL C,72(7),2053. |
| MLA | Meng, XH,et al."Rip/singularity free cosmology models with bulk viscosity".EUROPEAN PHYSICAL JOURNAL C 72.7(2012):2053. |
入库方式： OAI收割
来源：理论物理研究所
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